I am installing a Denon 786S receiver using line out zone 2 to power an amp. I am getting continuous bleed over from zone 2 to my surround sound speakers. It's faint without the the amp connected but very noticeable with the amp. The bleed over can be heard even when the line out cables are'nt connected to the receiver. I have even changed out the receiver and I get the same results. This is a standard surround sound setup. I will take all advice. Thank you.